{
  "manageEntity": {
    "action": "Save",
    "entityId": "409935",
    "entityType": "Track",
    "nonce": "0xc1f144f717da29d3f7418a49a5ce9b9c372ec16a5e7ec0d6c7dfd3d84ee8aa77",
    "signature": "0x8665551eab4b9bdfef9bf0dbf507166f0f11d83a7a575dca1a56d175f5d305691fb73090ae9cf9e734367754747d97f4a38331d92413024f9a943d096950d8141c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}